2014
DOI: 10.1590/0001-37652014117712
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Abstract: This paper presents gravimetric and morphologic analyses based on the satellite-derived data set of EGM2008 and TOPEX for the area of the oceanic mantle massif of the Saint Peter and Saint Paul peridotite ridge, Equatorial Atlantic Ocean. The free-air anomaly indicates that the present plate boundary is not situated along the longitudinal graben which cuts peridotite ridge, but about 20 km to the north of it. The high Bouguer anomaly of the peridotite ridge suggests that it is constituted mainly by unserpentin… Show more

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Cited by 8 publications
(5 citation statements)
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“…Из всего вышесказанного следует очевидный вывод, что породы верхней мантии транформных разломов не следует рассматривать в качестве ВОК. Надо отметить, что в литературе нередко доминирует иная точка зрения, например, например (Miranda et al, 2000;Motoki et al, 2009). ВЫВОДЫ 1.…”
Section: дискуссияunclassified
“…Из всего вышесказанного следует очевидный вывод, что породы верхней мантии транформных разломов не следует рассматривать в качестве ВОК. Надо отметить, что в литературе нередко доминирует иная точка зрения, например, например (Miranda et al, 2000;Motoki et al, 2009). ВЫВОДЫ 1.…”
Section: дискуссияunclassified
“…At the Saint Peter and Saint Paul Islets of the Equatorial Atlantic Ocean, the most intense active uplift of Brazil is observed (MOTOKI et al, 2009a;MOTOKI et al, 2014a ). In this area, the ENE-WSW trend transform fault is exceptionally not parallel to the E-W ward relative motion between South American Plate and African Plate, with maximum angular discordance of 25º .…”
Section: Palaeo-surface Reconstitutionmentioning
confidence: 99%
“…Their basement is constituted by Pan-African orthogneiss (HEILBRON et al, 2000;HEILBRON;MACHADO, 2003), paragneiss (VALLADARES et al, 2008), Post-tectonic granite (VALERIANO et al, 2011), silicified tectonic breccia 2012d), and early Cretaceous mafic dykes (BENNIO et al, 2003;MOTOKI et al, 2009b). Most of the basement rocks contain significant amount of quartz and this mineral is resistant to weathering.…”
Section: Macro Concavity Indexmentioning
confidence: 99%
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“…In Brazil, they have been applied to the geotectonic studies of mantle exhumation tectonic process of Equatorial Atlantic Ocean (Sichel et al, 2011;Motoki et al, 2014). The method is efficient also to continental passive margin, with special attention of sedimentary basins and continental crust thinning (Motoki & Motoki, 2012).…”
Section: Introductionmentioning
confidence: 99%